We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
SUPCO SSN4000 hot surface igniter, flat tip, 12 in leads, silicon nitride element

SUPCO

SUPCO SSN4000 Hot Surface Igniter 120V Universal Silicon

SKU CH-JRPS-R9WAN

Universal silicon-nitride hot-surface igniter for LP or natural-gas furnaces, 120 V AC with 12 in leads and 2 1/4 in probe

  • Silicon nitride element resists thermal shock for long service life
  • 120 V AC input matches standard furnace power supplies
  • 12 in lead wires give flexible routing in tight cabinets
  • Flat tip design fits many OEM burner assemblies
  • 300 °F lead insulation rating handles high-temperature environments

What This Igniter Does

The SUPCO SSN4000 is a hot surface igniter built for LP or natural gas heating systems in RV appliances. It operates on 120V AC and uses a silicon nitride heating element rated for up to 300 degrees F lead wire insulation temperature. The flat tip style and 12 inch lead length suit direct OEM replacement in compatible furnaces and water heaters.

Build and Connections

The probe measures 2 1/4 inches long with a flat tip designed to sit in the burner assembly. Leads are hardwired and 12 inches long, so installation requires splicing into the existing harness rather than plugging into a connector. Silicon nitride construction resists thermal shock better than older carbide types, and the universal design fits multiple brands without adapters.

When to Replace

This part replaces a failed original igniter that no longer glows or cracks under heat cycling. The jump is worth it when the furnace clicks but will not light, or when the old element shows visible fracture lines. It does not address gas valve, control board or airflow problems, so verify the igniter is the fault before ordering.

Highlights

  • Silicon nitride element resists thermal shock for long service life
  • 120 V AC input matches standard furnace power supplies
  • 12 in lead wires give flexible routing in tight cabinets
  • Flat tip design fits many OEM burner assemblies
  • 300 °F lead insulation rating handles high-temperature environments

Specifications

BrandSUPCO

Questions about this item

What voltage does the 120V AC input cap the igniter to in practice?

The igniter is rated for 120V AC input, which sets the maximum operating voltage for the silicon nitride heating element.

What physical dimensions must the furnace bracket accommodate for the 2 1/4 in probe and 12 in leads?

The flat-tip probe measures 2 1/4 inches long and the hardwired leads extend 12 inches, so the mounting bracket and wire routing must clear those lengths.

How is the hardwired connection installed, and what step do people often miss with the 300°F insulation rating?

Strip the 12-inch leads and connect them directly to the furnace wiring; the critical step is routing wires away from hot surfaces so the 300-degree F insulation limit is not exceeded.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.